问题描述
我已经在互联网上看到很多这个问题,但是所有解决方案都不适合我.
I've seen this question a lot on the internet, but all solutions didn't work for me..
所以这就是问题所在.我想要一个屏幕宽度为50%的按钮(效果很好).
So this is the problem. I want a button that has 50% width of the screen (that works fine).
但是现在我希望它的高度和宽度相同.
But now I want it to have the same height the as the width.
这不起作用:
Button button1 = (Button) findViewById(R.id.button1);
int btnSize = button1.getLayoutParams().width;
button1.setLayoutParams(new LinearLayout.LayoutParams(btnSize, btnSize));
查看以下代码:
Activity1.java:
Activity1.java:
package nl.jesse.project1;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.LinearLayout;
public class Activity1 extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_activity1);
Button button1 = (Button) findViewById(R.id.button1);
int btnSize = button1.getLayoutParams().width;
System.out.println(btnSize);
//button1.setLayoutParams(new LinearLayout.LayoutParams(btnSize, btnSize));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_activity1, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
Activity_activity1.xml:
Activity_activity1.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Activity1"
android:weightSum="1.0" >
<Button
android:layout_height="wrap_content"
android:layout_weight=".5"
android:layout_width="0dip"
android:text="@string/button1"
android:id="@+id/button1" />
</LinearLayout>
我已经尝试过此方法及其部分内容,但没有成功.
I've already tried this and parts of it, without success.
- How to set same width and height of a button
- ImageView - have height match width?
- Set same height as width at a ToggleButton
- Layout width equal height
那我在做什么错了?
推荐答案
好吧,我知道这可能不是最有效的方法,但是可以保证工作.
Ok I know this may not be the most efficient way to do it, but it is guaranteed to work.
您创建此ResizableButton
类:
import android.content.Context;
import android.util.AttributeSet;
import android.widget.Button;
public class ResizableButton extends Button {
public ResizableButton(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int width = MeasureSpec.getSize(widthMeasureSpec);
setMeasuredDimension(width, width);
}
}
,然后在您的Activity_activity1.xml上放置:
and on your Activity_activity1.xml, you put :
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="1.0"
tools:context=".Activity1">
<com.example.stackoverflow.ResizableButton
android:id="@+id/button1"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:text="Test" />
</LinearLayout>
然后,您将拥有一个始终具有与宽度相同的高度的按钮,并且如果您想使用该按钮,则在您的主要活动中,您将必须要缩放一个ResizableButton对象而不是一个Button.含义:
Then you have a button that always has the same height as width and if you want to play with the button, on your main activity you will have to decalre a ResizableButton object and not a Button. Meaning :
ResizableButton button1 = (ResizableButton) findViewById(R.id.button1);
还有Voilà.
这篇关于将按钮高度设置为等于按钮宽度的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!